Mercury – Quicksilver Fuse Assembly | 90 Amp | Outboard, Sterndrive & Inboard Systems | 79023T90

Overview

A reliable fuse might not look like much, but it’s one of the most important safety components in your boat’s electrical system. The Mercury Marine 79023T90 Quicksilver Fuse Assembly is a 90-amp fuse designed for use with outboards, sterndrives, and inboard engines. With a 5/16-inch (8mm) mounting hole, it’s easy to install in a range of setups. Built to Mercury’s standards, it delivers dependable protection against overloads and short circuits — keeping your wiring, battery systems, and onboard electronics safe when power surges strike.

Key Features

• Purpose: Protects high-amperage circuits from electrical overload or shorting.
• Rating: 90-amp fuse ideal for marine engine and accessory systems.
• Design: Features a 5/16-inch (8mm) mounting hole for secure installation.
• Material: Made from marine-grade, corrosion-resistant metals and housing.
• Performance: Provides fast, reliable current interruption to prevent system damage.
• Ease of Use: Simple bolt-on design for quick replacement or installation.

Engine & Boat Compatibility

• Outboards (Mercury, Mariner, and similar systems)
• Sterndrives and inboards (MerCruiser and compatible setups)
• Works in a variety of onboard electrical circuits and power distribution systems.

Performance & Real-World Benefits

The 79023T90 fuse assembly acts as your first line of defense against electrical problems. If an overload occurs, it safely breaks the circuit before damage can spread to key components. Whether protecting power trim, starter circuits, or battery feeds, it helps keep your boat’s electrical system safe and dependable.

This 90-amp version is perfect for medium-to-heavy current loads. Its corrosion-resistant build ensures reliable protection even after seasons of exposure to moisture and vibration. It’s one of those small maintenance parts that saves you from big electrical headaches later.

Why Choose Mercury OEM

The Quicksilver 79023T90 is a genuine Mercury Marine fuse, made to meet exact factory ratings and safety standards. Aftermarket versions may not trigger at the right amperage or could degrade faster in marine environments.

Mercury’s OEM fuses are tested for precision, fast response, and long-term durability under real boating conditions. Choosing OEM ensures your circuits are protected by the same quality found in new Mercury-powered boats.

FAQ

Q1: What’s the fuse rating?
It’s a 90-amp fuse designed for medium-to-heavy power circuits.

Q2: What engines or systems does it work with?
It can be used on outboard, sterndrive, and inboard engines, including power trim and starter circuits.

Q3: What’s the mounting hole size?
The mounting hole measures 5/16 inch (8mm) for secure installation.

Q4: Why should I replace my fuse?
If your system loses power or the fuse looks corroded or burned, replacing it restores safe protection.

Q5: Why OEM over generic fuses?
Mercury’s OEM fuses are built for marine use — precise, corrosion-resistant, and designed to trip accurately at their rated amperage.